accumulo-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Dylan Hutchison <>
Subject Re: Running low on memory and Zookeeper Session expired / disconnected
Date Fri, 11 Nov 2016 10:21:03 GMT
Mario, are you using native in-memory maps?  I've seen these problems run
rampant under Java memory maps.

On Fri, Nov 11, 2016 at 2:11 AM, Mario Pastorelli <> wrote:

> Hi all,
> I have two recurring errors with Accumulo in my cluster and I would like
> to know more about them. The first, usually happening at ingestion time
> when I write with the batch writers many records, is the "Running low on
> memory". We keep adding memory to Accumulo but this is a blind guess and I
> was wondering if there is a way to understand how much memory Accumulo
> would need considering the amount of data that will be written. Should we
> write slowly to Accumulo to avoid this? What is filling all the memory at
> ingestion time?
> Secondly, we have these zookeeper session expired and other zookeeper
> timeouts. Zookeeper on our cluster works quite well, we have many systems
> using it. How can I debug a "zookeeper session expired" in Accumulo?
> Thanks,
> Mario
> --
> Mario Pastorelli | TERALYTICS
> *software engineer*
> Teralytics AG | Zollstrasse 62 | 8005 Zurich | Switzerland
> phone: +41794381682
> email:
> Company registration number: CH- | Trade register Canton
> Zurich
> Board of directors: Georg Polzer, Luciano Franceschina, Mark Schmitz, Yann
> de Vries
> This e-mail message contains confidential information which is for the
> sole attention and use of the intended recipient. Please notify us at once
> if you think that it may not be intended for you and delete it immediately.

View raw message